Merlin: Heavy Loads

Pre-4.42: Merlin suffered from poor response time under heavy load (5 or more users searching simultaneously).

4.42 - Three changes:

Client requests prioritized - searches/sorts get low priority.
Merlin Toolkit data cache improved ("lookahead" feature)
Server's timeslice adjustable.

Results:

Dramatic improvement in response time from Merlin server during heavy-load situations.
Changes are invisible - client programs don't need to be modified.

Table of Contents

Merlin: Heavy Loads

Pre-4.42: Merlin suffered from poor response time under heavy load (5 or more users searching simultaneously).

4.42 - Three changes:

Client requests prioritized - searches/sorts get low priority.
Merlin Toolkit data cache improved ("lookahead" feature)
Server's timeslice adjustable.

Results:

Dramatic improvement in response time from Merlin server during heavy-load situations.
Changes are invisible - client programs don't need to be modified.

Merlin: Heavy Loads

Pre-4.42: Merlin suffered from poor response time under heavy load (5 or more users searching simultaneously).

4.42 - Three changes:

Client requests prioritized - searches/sorts get low priority. Merlin Toolkit data cache improved ("lookahead" feature) Server's timeslice adjustable.

Results:

Dramatic improvement in response time from Merlin server during heavy-load situations. Changes are invisible - client programs don't need to be modified.

Client requests prioritized - searches/sorts get low priority.
Merlin Toolkit data cache improved ("lookahead" feature)
Server's timeslice adjustable.

Dramatic improvement in response time from Merlin server during heavy-load situations.
Changes are invisible - client programs don't need to be modified.